c# - 合并单元格的 GridView

Question

我需要在网格视图中显示数据，并为某些列合并行。请帮助我准备以下定义格式的网格视图：

来自数据库的原始数据格式如下：

请帮助我找到动态有效地完成这项任务的最佳方法。

Answer 1

您将不得不使用RowSpan.

请参考以下代码：

protected void GridView1_DataBound1(object sender, EventArgs e)
{
  for (int rowIndex = GridView1.Rows.Count - 2;
                                     rowIndex >= 0; rowIndex--)
  {
    GridViewRow gvRow = GridView1.Rows[rowIndex];
    GridViewRow gvPreviousRow = GridView1.Rows[rowIndex + 1];
    for (int cellCount = 0; cellCount < gvRow.Cells.Count;
                                                  cellCount++)
    {
     if (gvRow.Cells[cellCount].Text ==
                            gvPreviousRow.Cells[cellCount].Text)
     {
       if (gvPreviousRow.Cells[cellCount].RowSpan < 2)
       {
         gvRow.Cells[cellCount].RowSpan = 2;
       }
       else
       {
        gvRow.Cells[cellCount].RowSpan =
            gvPreviousRow.Cells[cellCount].RowSpan + 1;
       }
       gvPreviousRow.Cells[cellCount].Visible = false;
    }
   }
}

参考：

https://sites.google.com/site/learning6329/asp-net/gridview-merge-cells

有问题的图片示例：

http://marss.co.ua/MergingCellsInGridView.aspx

Answer 2

合并第一列的行单元格的最简单方法如下。请注意，For 循环总是要反向迭代。

protected void GridView1_DataBound(object sender, EventArgs e)
    {
        int RowSpan = 2;
        for (int i = GridView1.Rows.Count-2; i >=0 ;i-- )
        {
            GridViewRow currRow = GridView1.Rows[i];
            GridViewRow prevRow = GridView1.Rows[i+1];
            if (currRow.Cells[0].Text == prevRow.Cells[0].Text)
            {
                currRow.Cells[0].RowSpan = RowSpan;
                prevRow.Cells[0].Visible = false;
                RowSpan += 1;
            }
            else
                RowSpan = 2;
        }
    }

如果你想类似地合并所有列的行单元格，你可以在上面写的外部forloop中使用另一个“forloop”